Rezumat problemă

perechiAB

#4265

Se dă un șir v1, v2, …, vn de numere naturale nenule și de asemenea se dau două numere naturale nenule A și B. Să se determine numărul perechilor (vi , vj) cu i < j și A ≤ vi + vj ≤ B.

Folclorul informatic

Consola Pracsiu Dan (dnprx) Dan Pracsiu dificilă

Clasa 9 Tablouri unidimensionale (vectori) Probleme cu secvențe Cautare binara Two Pointers

Rezolvă

Detalii

Problema	perechiAB	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64487797	Utilizator	Petre Eric Mihai (erice12345)
Fișier	perechiab.cpp	Dimensiune	704 B
Data încărcării	10 Mai 2026, 19:20	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

perechiab.cpp: In function ‘int main()’:
perechiab.cpp:5:1: error: ‘lonf’ was not declared in this scope; did you mean ‘long’?
    5 | lonf long n,st,dr,mij,x,val,poz1,poz2,nr,a,b;
      | ^~~~
      | long
perechiab.cpp:6:6: error: ‘n’ was not declared in this scope; did you mean ‘yn’?
    6 | cin>>n;
      |      ^
      |      yn
perechiab.cpp:8:5: error: ‘x’ was not declared in this scope
    8 | for(x=1;x<=n;x++)
      |     ^
perechiab.cpp:10:6: error: ‘v’ was not declared in this scope
   10 | cin>>v[x];
      |      ^
perechiab.cpp:12:6: error: ‘a’ was not declared in this scope
   12 | cin>>a>>b;
      |      ^
perechiab.cpp:12:9: error: ‘b’ was not declared in this scope
   12 | cin>>a>>b;
      |         ^
perechiab.cpp:13:6: error: ‘v’ was not declared in this scope
   13 | sort(v+1,v+n+1);
      |      ^
perechiab.cpp:14:1: error: ‘nr’ was not declared in this scope
   14 | nr=0;
      | ^~
perechiab.cpp:15:5: error: ‘x’ was not declared in this scope
   15 | for(x=1;x<=n;x++)
      |     ^
perechiab.cpp:17:1: error: ‘st’ was not declared in this scope; did you mean ‘std’?
   17 | st=x+1;
      | ^~
      | std
perechiab.cpp:18:1: error: ‘dr’ was not declared in this scope
   18 | dr=n;
      | ^~
perechiab.cpp:19:1: error: ‘mij’ was not declared in this scope
   19 | mij=(st+dr)/2;
      | ^~~
perechiab.cpp:20:1: error: ‘val’ was not declared in this scope
   20 | val=a-v[x];
      | ^~~
perechiab.cpp:27:17: error: ‘poz1’ was not declared in this scope
   27 | if(v[mij]==val) poz1=mij;
      |                 ^~~~
perechiab.cpp:28:22: error: ‘poz1’ was not declared in this scope
   28 | else if(v[mij]!=val) poz1=st;
      |                      ^~~~
perechiab.cpp:39:17: error: ‘poz2’ was not declared in this scope
   39 | if(v[mij]==val) poz2=mij;
      |                 ^~~~
perechiab.cpp:40:22: error: ‘poz2’ was not declared in this scope
   40 | else if(v[mij]!=val) poz2=dr;
      |                      ^~~~
perechiab.cpp:41:5: error: ‘poz2’ was not declared in this scope
   41 | nr+=poz2-poz1+1;
      |     ^~~~
perechiab.cpp:41:10: error: ‘poz1’ was not declared in this scope
   41 | nr+=poz2-poz1+1;
      |          ^~~~

Cum funcționează evaluarea?